If the days of the year were numbered backward using consecutive numbers (so that December 31 is day number 1), in what month would day number 123 occur?

Question

If the days of the year were numbered backward using consecutive numbers (so that December 31 is day number 1), in what month would day number 123 occur?
A. August
B. July
C. March
D. September

I got September but I’m not sure if that’s the correct answer

bobpursley · Answer

days dec 31 Nov 30 Oct 31 Sep 30 total 122 till Christmas add a day in August.